CA2188547A1 - Piezoelectric sensing systems - Google Patents
Piezoelectric sensing systemsInfo
- Publication number
- CA2188547A1 CA2188547A1 CA002188547A CA2188547A CA2188547A1 CA 2188547 A1 CA2188547 A1 CA 2188547A1 CA 002188547 A CA002188547 A CA 002188547A CA 2188547 A CA2188547 A CA 2188547A CA 2188547 A1 CA2188547 A1 CA 2188547A1
- Authority
- CA
- Canada
- Prior art keywords
- signal
- drive signal
- drive
- return signal
- return
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
- G01F23/2966—Acoustic waves making use of acoustical resonance or standing waves
- G01F23/2967—Acoustic waves making use of acoustical resonance or standing waves for discrete levels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
- G01F23/2968—Transducers specially adapted for acoustic level indicators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/036—Analysing fluids by measuring frequency or resonance of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02836—Flow rate, liquid level
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Immunology (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Measuring Fluid Pressure (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Burglar Alarm Systems (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Geophysics And Detection Of Objects (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9408176.7 | 1994-04-25 | ||
GB9408176A GB9408176D0 (en) | 1994-04-25 | 1994-04-25 | Fluid level detectors |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2188547A1 true CA2188547A1 (en) | 1995-11-02 |
Family
ID=10754082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002188547A Abandoned CA2188547A1 (en) | 1994-04-25 | 1995-04-25 | Piezoelectric sensing systems |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP0757784B1 (de) |
JP (1) | JPH11503820A (de) |
KR (1) | KR970702479A (de) |
AT (1) | ATE185420T1 (de) |
AU (1) | AU2313295A (de) |
CA (1) | CA2188547A1 (de) |
DE (1) | DE69512652T2 (de) |
DK (1) | DK0757784T3 (de) |
ES (1) | ES2138733T3 (de) |
GB (2) | GB9408176D0 (de) |
NO (1) | NO964523L (de) |
WO (1) | WO1995029388A1 (de) |
ZA (1) | ZA953346B (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6044694A (en) * | 1996-08-28 | 2000-04-04 | Videojet Systems International, Inc. | Resonator sensors employing piezoelectric benders for fluid property sensing |
DE19720519C2 (de) * | 1997-05-16 | 2000-03-30 | Pepperl & Fuchs | Vorrichtung zur Feststellung und/oder Überwachung eines Füllstandes eines Mediums in einem Behälter |
DE19933044B4 (de) * | 1999-07-15 | 2005-09-01 | Siemens Ag | Füllstandsgeber für einen Flüssigkeitsbehälter und Verfahren zur Ermittlung des Füllstandes in einem Flüssigkeitsbehälter |
DE19933043B4 (de) * | 1999-07-15 | 2005-07-28 | Siemens Ag | Füllstandsgeber für einen Flüssigkeitsbehälter und Verfahren zur Ermittlung des Füllstandes in einem Flüssigkeitsbehälter |
DE10153937A1 (de) * | 2001-03-28 | 2003-02-27 | Endress & Hauser Gmbh & Co Kg | Vorrichtung zur Feststellung und/oder Überwachung eines vorbestimmten Füllstandes in einem Behälter |
US6938475B2 (en) | 2001-03-28 | 2005-09-06 | Endress + Hauser Gmbh + Co. Kg | Device for establishing and/or monitoring a predetermined fill level in a container |
DE10203461A1 (de) * | 2002-01-28 | 2003-08-14 | Grieshaber Vega Kg | Schwingungsgrenzstandsensor |
DE10350331B4 (de) * | 2003-10-29 | 2006-11-09 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Schaltungsanordnung und Verfahren zur Ausgabe von Analogsignalen durch einen Mikroprozessor |
EP2151672A1 (de) * | 2008-08-08 | 2010-02-10 | VEGA Grieshaber KG | Verfahren zum Messen eines Füllstands oder Grenzstands, Füllstand- oder Grenzstandmessgeräte-Schaltung und Füllstand- oder Grenzstandmessgerät |
EP2341323A1 (de) * | 2009-12-17 | 2011-07-06 | BAE Systems PLC | Sensoren |
WO2011073667A1 (en) * | 2009-12-17 | 2011-06-23 | Bae Systems Plc | Sensors |
US9179843B2 (en) | 2011-04-21 | 2015-11-10 | Hassan Ghaderi MOGHADDAM | Method and system for optically evaluating proximity to the inferior alveolar nerve in situ |
DE102011075113A1 (de) * | 2011-05-03 | 2012-11-08 | Endress + Hauser Gmbh + Co. Kg | Vorrichtung und Verfahren zum Betreiben einer Vorrichtung zur Bestimmung und/oder Überwachung mindestens einer physikalischen Prozessgröße |
EP3214424A1 (de) * | 2016-03-04 | 2017-09-06 | Buira Nunez, Ernest | Detektionsvorrichtung, system und verfahren zur messung von flüssigkeitseigenschaften einschliesslich viskosität und/oder dichte |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2632632A1 (de) * | 1976-07-20 | 1978-01-26 | Ici Ltd | Verfahren und geraet zur ueberwachung von parametern |
FR2436372A1 (fr) * | 1978-09-13 | 1980-04-11 | Cit Alcatel | Dispositif de controle du niveau d'un materiau fluide contenu dans un reservoir vertical |
DE3314872A1 (de) * | 1983-04-25 | 1984-10-25 | Vdo Adolf Schindling Ag, 6000 Frankfurt | Einrichtung zur meldung des fuellstandes an dem ort eines sensors |
US5428997A (en) * | 1992-07-20 | 1995-07-04 | Pasteur Sanofi Diagnostics | Method of and device for fluid surface detection using an ultrasonic transducer |
-
1994
- 1994-04-25 GB GB9408176A patent/GB9408176D0/en active Pending
-
1995
- 1995-04-25 DK DK95916761T patent/DK0757784T3/da active
- 1995-04-25 ES ES95916761T patent/ES2138733T3/es not_active Expired - Lifetime
- 1995-04-25 JP JP7527478A patent/JPH11503820A/ja active Pending
- 1995-04-25 ZA ZA953346A patent/ZA953346B/xx unknown
- 1995-04-25 CA CA002188547A patent/CA2188547A1/en not_active Abandoned
- 1995-04-25 KR KR1019960705954A patent/KR970702479A/ko not_active Application Discontinuation
- 1995-04-25 GB GB9622296A patent/GB2302178B/en not_active Expired - Lifetime
- 1995-04-25 DE DE69512652T patent/DE69512652T2/de not_active Expired - Fee Related
- 1995-04-25 WO PCT/GB1995/000938 patent/WO1995029388A1/en active IP Right Grant
- 1995-04-25 AT AT95916761T patent/ATE185420T1/de not_active IP Right Cessation
- 1995-04-25 AU AU23132/95A patent/AU2313295A/en not_active Abandoned
- 1995-04-25 EP EP95916761A patent/EP0757784B1/de not_active Expired - Lifetime
-
1996
- 1996-10-24 NO NO964523A patent/NO964523L/no not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
GB9408176D0 (en) | 1994-06-15 |
GB9622296D0 (en) | 1996-12-18 |
KR970702479A (ko) | 1997-05-13 |
DE69512652T2 (de) | 2000-04-27 |
GB2302178B (en) | 1998-04-29 |
WO1995029388A1 (en) | 1995-11-02 |
AU2313295A (en) | 1995-11-16 |
NO964523D0 (no) | 1996-10-24 |
GB2302178A (en) | 1997-01-08 |
ATE185420T1 (de) | 1999-10-15 |
NO964523L (no) | 1996-11-14 |
ES2138733T3 (es) | 2000-01-16 |
EP0757784A1 (de) | 1997-02-12 |
ZA953346B (en) | 1996-01-11 |
DE69512652D1 (de) | 1999-11-11 |
DK0757784T3 (da) | 2000-03-20 |
EP0757784B1 (de) | 1999-10-06 |
JPH11503820A (ja) | 1999-03-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2188547A1 (en) | Piezoelectric sensing systems | |
US5895848A (en) | Apparatus and method for level sensing in a container | |
EP0079422B1 (de) | Verfahren und Vorrichtung zur Feststellung des Vorhandenseins einer Flüssigkeit | |
US4675854A (en) | Sonic or ultrasonic distance measuring device | |
US6851313B2 (en) | Vibratory level sensor | |
US6212936B1 (en) | Ultrasonic transmitter particularly for an air bubble detector | |
CN100406862C (zh) | 振动液位传感器 | |
JPH08504038A (ja) | 容器内の所定の充填レベルの検出および/または監視方法および装置 | |
US5596311A (en) | Method and apparatus for driving a self-resonant acoustic transducer | |
ATE276885T1 (de) | Vorrichtung zur überwachung der flüssigkeitsmenge und damit versehene flüssigkeitsverbrauchende vorrichtung | |
CN1338668A (zh) | 控制压电振动部件馈送器的方法和装置 | |
US5943294A (en) | Level detector for fluent material | |
KR100450537B1 (ko) | 부품공급기 및 그 제어방법 | |
EP0580483A1 (de) | Verfahren und Vorrichtung zur Flüssigkeitsoberflächenermittlung unter Anwendung eines Ultraschallwandlers | |
US5748562A (en) | Level detector for solids | |
GB2351805A (en) | Level detector for fluent material | |
US3789352A (en) | Method and apparatus for testing depth finders | |
JPH0775700B2 (ja) | 固有共振振動に対する機械振動系の自励振回路装置 | |
US4882539A (en) | Monitoring system for electrodynamic wall-thickness and defect testing using a delay line | |
RU2150708C1 (ru) | Способ электрического возбуждения резонансных колебаний пьезоэлектрического акселерометра и устройство для его осуществления | |
SU1270575A1 (ru) | Резонансный уровнемер | |
CZ2006439A3 (cs) | Zarízení pro kontinuální merení kmitu strunových tenzometrických snímacu s dvouvodicovým pripojením | |
CA2277595A1 (en) | Level detector for fluent material | |
RU2121149C1 (ru) | Способ определения отклонения амплитуды сигнала датчика | |
RU2047109C1 (ru) | Устройство для контроля уровня жидкости |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
FZDE | Discontinued |